Simplification (Combined Addition and Subtraction)
Now we will consider some examples having addition and subtraction operations both
Example 1. Simplify 4328 + 1286 – 3290
Solution: First add the numbers having + sign
Th H T O
1 1
4 3 2 8
+ 1 2 8 6
5 6 1 4
Now subtract number having – sign form the sum of the numbers having + sign
Therefore,
4328 + 1286 – 3290 = 2324
A number without any sign it has + sign
Example 2. Simplify 3756 – 4129 + 2123.
Solution: First add the numbers having + sign
Th H T O
3 7 5 6
+ 2 1 2 3
5 8 7 9
Now subtract the number having – sign from the sum of the numbers having + sign
Th H T O
5 8 7 9
- 4 1 2 9
1 7 5 0
Therefore, 3756 – 4129 + 2123 = 1750
Remember,
First we add and then subtract.
Simplify
- 2198 + 4356 – 3254
- 2632 + 1948 – 1452
- 5327 + 1235 – 2354
- 8960 + 3125 – 1985
- 1789 + 1346 – 1896
- 1823 – 2528 + 2357
- 5329 – 2195 + 3518
- 4520 – 4185 + 1159
- 1528 + 1346 – 1896
- 5353 – 7958 + 3349
How to Solve the Word Problem
Word Problems:-
Example1. In a health camp, the doctors attended 4938 patients. If there were 2466 male patients,
find the number of female patients?
Solution: Number of patients = 4938
Number of male patients = - 2466
Number of female patients = 2472
Answer. 2472 female patients
Example2. There are 2985 flower plants in a garden. Out of them 1892 are rose plants and the
remaining ate lily plants. How many lily plants are there?
Solution. Total number of plants = 2985
Number of rose plants = - 1892
Number of lily plants = 1093
Answer. 1093 lily plants
Example3. John had 2138 toys and Maya had 2381 toys. Who had more toys and by how many?
Solution. Maya has toys = 2381
John has toys = - 2138
Difference of toys = 0243
Example4. 2550 sweets were distributed in one class and 1570 sweets in another class. If there were
6050 sweets, how many sweets were left?
Solution. Sweets distributed in one class = 2550
Sweets distributed in another class = + 1570
Total sweets distributed = 4120
Total sweets = 6050
Total sweets distributed = - 4120
Sweets left = 1930
Solve the Following
- There are 2458 students in a school. Out of them, 1222 are girls. How many are boys in the school ?
- David had 2095 mangoes. He sold 1495 mangoes out of it. How many mangoes are left with him now?
- In a village, there are 5492 people. Out of them, 2435 are adults. How many are children in the village ?
- Emily had 9896 stamps. Out of them, 3112 stamps are lost. How many stamps are left with her now?